Well could you elaborate on
the Red Zone system as developed by Jerry Wetzel
It's a method that, as I said, is designed to deal with the type of attack that we saw in the video-clip. The basic principles are jam the attack to immobilize the arm holding the knife, transition to a position from which you can control the arm, and beat the guy 'till he drops the knife.
There are two techniqes taught to initially immobilze the arm. The first one is to basically pin his arm against his own body. This serves to slow his motion to the point where you can get a firm grasp on his wrist. The second technique is referred to as "the dive." In this technique you basically wedge your arms in between his knife-arm and his body, and then hug his arm to your chest (think of having "underhooks" on his arm"). Once again, from here you're ready to transition to the next position. Both of these techniques depend heavily on aggression and forward drive.
The second or transitory position is referred to as the baseball-bat grip. Basically you grab his wrist with both hands and drive down, locking your arms, and putting you're weight over the knife by leaning forward. This serves to keep him from being able to continue to stab since he now has to lift all your weight in addition to fighting your strength.
The third position is the control position. The technique that is taught is referred to as the 2-on-1. It's basically an arm-bar where you're standing next to him, your right hand (for someone with the knife in his right) is still grabbing his wrist, and your left hand comes up under his arm-pit and grabs his shoulder. In this technique, your chest provides the fulcrum for the lock.
I personally prefer a slightly different position. I use the arm-pit trap (also an arm-bar technique) where you have his upper arm trapped under your arm. I like this position because it makes it easier to control his position. By simply squatting down a little, you can drive him right into the floor.
So, that's the best description I can give. It's a little hard to envision some of this because it's such an agressive, dynamic technique. However, after training it at full speed/full contact with a partner, I've become very confident that it will be effective while minimizing the injuries. I highly recommend this method.
Here's a link to the site you y'all can check out the videos
http://centerlinegym.com/gym_gear.htm